Rich bog off idle?

A little more info, I had initial at 20 and total at 38 with a limiter plate on the mechanical. I would go into detonation about 3200 rpm, too much advance but ran like a rocket through
the rest of the range. I had to get the total down to something acceptable so I reset the initial to 12 and reset the limiter plate tighter two notches and the vacuum signal to the carb changed. It liked the 20 initial but I was afraid I would to detonation damage. I got it tuned to cold and hot idle in the 800/700 range and the A/F ratios where I want them through the range. Because I only have 1200 miles on the engine I haven't wanted to take it above 4000 yet but I built it to turn 5500.
The only problem I seem to be having now is low gear off idle the A/F seems to richen more than I want and the car does have a bit of a bog. I don't want to change the timing profile I have in the car now. I should be able to get it with Carb adjustment-my thought.
Thanks for reading------------DR-------------